cerebellar cotrical mechanism

Question 1

the 2 kinds of synaptic inputs to cerebellum

Answer 1

climbing fibers and mossy fibers

Question 2

climbing fibers and mossy fibers are excitatory to ______

Answer 2

purkinje cells

Question 3

these are the terminal fibers of contralateral inferior olivary nuc or olivocerebellar tract

Answer 3

climbing fibers

Question 4

discus path of climbing fibers

Answer 4

passes granular layer and terminate in molecular layer tas dun mag branch

will synapse c dendries of prukinje cell = excitatory synapses

few branches synapse c stellate and basket

Question 5

discuss ratio of purkinje and climbing fiber

Answer 5

1 climbing : 10 purkinje

1 purkinje : 1 climbing

Question 6

terminal fibers for all other cerebellar afferent tracts

Answer 6

mossy fibers

Question 7

discuss path of mossy fibers

Answer 7

ascends in cerebellar WM to form excitatory synapses c dendrites of granule cells

tas GC send axons to molecular later tas bifurcate into parallel fibers

parallel fibers synapse c many purkinje

Question 8

ratio of mossy and purknje

Answer 8

1 mossy : thousands of purkinje via parallel fibers of granule

Question 9

this carries all cerebellar cortex output into cerebellar WM

Answer 9

purkinje cell axons

Question 10

discuss inhibitory synapses of purkinje

Answer 10

inhib synapse c deep cerebellar nuclei and vestibular nuclei

then those nuc convey outputs to other regions via excitatory synapse

Question 11

excitatory NT of cerebellar cortex

Answer 11

glutamate

Question 12

NT that modifies action of glutamate on purkinje

Answer 12

norepi and serotonin

Question 13

where is glutamate found

Answer 13

climbing and mossy fibers to dendrites of purkinje

Question 14

stellate cells terminate on ______

Answer 14

dendrites of purkinje

Question 15

basket cells terminate on ______

Answer 15

purkinje cell body

Question 15

significance of golgi cells

Answer 15

provides feedback inhibition = shorten duration of excitatory inputs to granule cell